modality N1 rare writtenliterary
とでもいうべき — what one might call
とでもいうべき
A full written guide for とでもいうべき is on the way.
This point is mapped in the grammar tree, but its examples, formation table and usage notes haven't been written yet. The fastest way to learn it now is to meet it in real sentences inside Jengo.
See とでもいうべき in real sentences
Jengo shows とでもいうべき the way you actually meet it: inside real Japanese sentences, so it sticks instead of staying an abstract rule.
Study it in JengoSources Compiled with reference to A Dictionary of Advanced Japanese Grammar. Editorial confidence: medium.